Shock absorber structure assembly, shock absorber and transportation tool

Abstract

The invention relates to a shock absorber assembly (100), in particular for a vehicle (300), comprising: an inner tube (110), which is filled with a damping liquid (10) and is designed to damp a piston movement in the inner tube (110); an outer tube (120) arranged around the inner tube (110), fluidly connected to the inner tube (110) and embodied for receiving a damping liquid (10) and a damping gas (20); a valve (130) which is designed to output the damping liquid (10) to the outer tube (120) and to discharge the damping liquid (10) from the outer tube (120), the valve (130) being fluidically connected to the outer tube (120); and a flow brake (140), which is designed to brake the movement of the damping liquid (10); wherein a flow brake (140) is arranged at the outer tube (120). The invention also relates to a shock absorber (200) and a vehicle (300).

Description

Technical Field

[0001] The present invention relates to a shock absorber structural assembly, a shock absorber (or impact damper, i.e. ) and a means of transport. Background Art

[0002] Shock absorbers are an integral component of a vehicle and serve to reduce the effects of heaves on the vehicle spring system (or vehicle suspension, i.e. Fahrzeugfederung). Shock absorbers absorb kinetic energy and ensure controlled movement of the vehicle structure. Usually, shock absorbers are filled with a damping liquid, which flows from one chamber to another via special seals, thereby achieving damping. At least one chamber contains a gas, which achieves a volume balance. However, under certain excitation conditions, it can happen that damping liquid and gas mix to form a foam.

[0003] This foaming in the shock absorber is a serious problem, since it can have a negative impact on the driving stability of the vehicle. Foaming occurs when gas bubbles are entrained in the damping fluid and thereby form a foam-like structure.

[0004] Foam formation can have a number of negative effects on the function of a shock absorber. On the one hand, the efficiency of the damping characteristics can be directly reduced. The foam can change the damping characteristic curve so that the shock absorber no longer has the intended damping characteristics. On the other hand, the foam can have a negative impact on the function of other components of the shock absorber, in particular valves. These valves are usually designed for the operation of liquids and are no longer properly adjusted if foam penetrates into the valve. Summary of the invention

[0005] The object of the present invention is to at least partially eliminate the above-mentioned disadvantages known from the prior art. In particular, the object of the present invention is to provide a shock absorber assembly, a shock absorber and a vehicle in which foam formation is reduced or completely prevented and at the same time the structural design complexity and production costs are low.

[0006] The above-mentioned object is achieved by the shock absorber assembly, the shock absorber and the vehicle according to the invention. Further features and details of the invention are derived from the corresponding dependent claims, the description and the drawings. Here, the features and details described in connection with the shock absorber assembly according to the invention are of course also applicable in connection with the shock absorber according to the invention and / or the vehicle according to the invention, and vice versa, respectively, so that reference is always made to each other or can be made to each other with respect to the disclosure of the various aspects of the invention.

[0007] According to a first aspect of the present invention, a shock absorber structural assembly is provided, in particular a shock absorber structural assembly for a vehicle, the shock absorber structural assembly comprising:

[0008] an inner tube filled with a damping liquid and designed to damp the movement of a piston within the inner tube;

[0009] an outer tube which is arranged around the inner tube, is fluidically connected to the inner tube and is designed to receive a damping liquid and a damping gas;

[0010] a valve which is designed to discharge damping liquid to the outer tube and to conduct damping liquid away from the outer tube, wherein the valve is fluidically connected to the outer tube;

[0011] a flow brake which is designed to brake the movement of the damping fluid;

[0012] Therein, the flow brake is arranged on the outer pipe.

[0013] In other words, according to the present invention, a component for a shock absorber is provided, which has an inner cylinder and an outer cylinder, which are plugged into each other and form a common reservoir, wherein the inner cylinder is filled with liquid and the outer cylinder is filled with liquid and gas. The inner cylinder damps the movement of the piston arranged in the inner cylinder, while the outer cylinder compensates the volume change in the inner cylinder. In addition, the outer cylinder has not only a valve but also a device for braking the flow rate of the moving liquid. The valve is implemented to discharge liquid from the reservoir or add liquid to the reservoir.

[0014] A shock absorber assembly may be understood to be a combination of components which together form a subassembly of a shock absorber and / or the shock absorber.

[0015] In principle, the damping liquid can be any liquid. Depending on the application, a damping liquid with a viscosity suitable for the application can be selected. In particular, the damping liquid can be implemented as oil. The damping gas can be implemented as air, in particular pressure-loaded.

[0016] In principle, the vehicle can be any type of motor-driven vehicle. The vehicle can be designed as a land vehicle, a water vehicle or an air vehicle. In particular, the vehicle can be a passenger car or a truck. The vehicle can also have an internal combustion engine and / or an electric motor. It can also be provided that the vehicle is only electrically driven.

[0017] In the context of the present invention, an inner tube is understood to be a cylindrical body which has at least one inner side along which the piston can slide and an outer side which is surrounded by the outer tube at a distance.

[0018] An outer tube is to be understood as a cylindrical body which—in particular concentrically—encloses the inner tube at a distance such that a volume is enclosed between the inner side of the outer tube and the outer side of the inner tube in which the outer tube can accommodate both the damping fluid and the damping gas.

[0019] The valve is arranged, in particular on the outside, at the outer tube and has at least an open state, in which damping liquid can flow in and / or out through the valve, and a closed state, in which a flow of damping liquid through the valve is prevented. In addition, at least one further valve may be provided. It may be provided that the further valve is connected to an intermediate tube, which is also arranged inside the outer tube, in particular below the inner tube. It is conceivable that the inner tube damps the piston in a first direction of movement, while the intermediate tube damps the piston in a second direction of movement, wherein the second direction of movement is opposite to the first direction of movement.

[0020] A flow brake can be understood as a spatially solid object which is designed to reduce the flow velocity of the liquid when the liquid flows around it. Flow brakes are explained in more detail below.

[0021] The flow brake is arranged at the outer pipe. In other words, the outer pipe has the flow brake. In particular, the outer pipe is connected to the flow brake.

[0022] In summary, the shock absorber assembly according to the invention offers the following advantages: foam formation is reduced or completely prevented and at the same time the design complexity and manufacturing costs are low. In addition, assembly is simplified. A reservoir filled with a fluid is provided by the inner tube and the outer tube, by means of which the piston located in the inner tube can be effectively damped. The flow brake reduces the flow rate of the damping fluid, thereby preventing or at least reducing foam formation. As a result, the valve can always be used in accordance with its function. By arranging the flow brake on the outer tube, production and assembly are also simplified, thereby reducing the costs for the assembly.

[0023] Furthermore, it is advantageously provided in the shock absorber assembly according to the invention that the flow brake can be implemented as a projection that is circumferentially disposed on the inner side of the outer tube, in particular in a spiral shape. The circumferential design achieves the advantage that the flow velocity of the damping fluid is reduced over the entire inner circumference of the outer tube and foaming is thereby prevented or reduced. In the case of a spiral design, the advantage is also achieved that the flow velocity is reduced even at a greater height of the outer tube. Furthermore, the flow can be guided and the velocity adjusted overall by the steepness of the spiral.

[0024] Furthermore, it is conceivable within the scope of the invention that the flow brake is implemented as a spiral. This achieves the following effect: depending on the application, the outer cylinder can be combined with a suitably designed flow brake without having to adapt the inner tube and / or the outer tube. This simplifies the structural design and saves costs in terms of production.

[0025] Furthermore, in the shock absorber assembly according to the invention, it can be advantageously provided that the flow brake is designed as a projection, in particular a stamped portion, which is connected in one piece to the inner side of the outer tube. The one-piece design saves at least one step in assembling the shock absorber assembly, thereby simplifying production. The design as a stamped portion can also be manufactured particularly conveniently, so that the costs for the shock absorber assembly as a whole are particularly low.

[0026] Furthermore, it can be advantageously provided in the damper assembly according to the invention that the flow brake is made of metal and / or plastic. In the case of a design made of metal, particularly high loads, in particular at high pressures, can be absorbed by the damper assembly. Plastic offers the advantage that it is particularly light and cost-effective compared to metal. It can be provided that the material of the flow brake is particularly oil-resistant and / or corrosion-resistant. This can improve the durability of the damper assembly, thereby reducing costs overall.

[0027] Furthermore, it is conceivable within the scope of the invention that a latching aid can be provided on the outer tube, which is designed to hold the flow brake on the outer tube in a form-fitting manner. This achieves the advantage that the assembly of the shock absorber assembly is further simplified. The flow brake only has to be brought approximately into the correct position, so that it then springs into the latching aid, which can be designed in particular as a recess, and remains in a mechanically stable position.

[0028] Furthermore, in the shock absorber assembly according to the invention, it is conceivable that the flow brake is arranged at least partially between a damping gas region, which in the rest position contains mainly damping gas, and the valve. This achieves the advantage that the flow velocity is effectively reduced at locations where foaming occurs particularly frequently. In particular, the proximity to the valve offers the advantage that this component, which is sensitive to foaming in terms of its function, can be protected from the occurrence or intrusion of foam.

[0029] Furthermore, in the shock absorber assembly according to the invention it is conceivable that the valve is designed to influence the damping characteristic curve by adding or draining damping fluid, thereby achieving the advantage that the damping of the shock absorber can be adapted to the conditions of the vehicle environment and / or the driver's preferences.

[0030] According to a further aspect of the invention, a shock absorber is provided which has at least one shock absorber assembly according to the invention.

[0031] The shock absorber according to the invention therefore brings with it the same advantages as have already been described in detail with regard to the shock absorber assembly according to the invention.

[0032] According to a further aspect of the invention, a vehicle is provided which has at least one shock absorber according to the invention and / or a shock absorber assembly according to the invention.

[0033] The vehicle according to the invention therefore brings with it the same advantages as have already been described in detail with regard to the shock absorber assembly according to the invention and / or the shock absorber according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Further advantages, features and details of the invention can be gathered from the following description, in which exemplary embodiments of the invention are described in detail with reference to the accompanying drawings. The features mentioned in the claims and in the description may be essential to the invention individually or in any combination.

[0035] Figure 1 A side view showing the shock absorber structural assembly and the shock absorber, and

[0036] Figure 2 A vehicle having a shock absorber structure assembly and a shock absorber is shown. DETAILED DESCRIPTION

[0037] In the following description of some embodiments of the present invention, the same reference numerals are used for the same technical features even in different embodiments.

[0038] Figure 1 A shock absorber structural assembly 100 is shown, in particular a shock absorber structural assembly 100 for a vehicle 300, said shock absorber structural assembly comprising:

[0039] an inner tube 110 which is filled with a damping liquid 10 and is designed to damp the movement of a piston in the inner tube 110 ;

[0040] an outer tube 120 which is arranged around the inner tube 110 , is fluidically connected to the inner tube 110 and is designed to receive the damping liquid 10 and the damping gas 20 ;

[0041] a valve 130 , which is designed to discharge the damping liquid 10 to the outer tube 120 and to discharge the damping liquid 10 from the outer tube 120 , wherein the valve 130 is fluidically connected to the outer tube 120 ;

[0042] a flow brake 140 , which is designed to brake the movement of the damping fluid 10 ;

[0043] The flow brake 140 is arranged on the outer pipe 120 .

[0044] In summary, the shock absorber assembly 100 according to the invention offers the following advantages: foam formation is reduced or completely prevented and at the same time the structural design effort and manufacturing costs are low. A reservoir filled with a fluid is provided by the inner tube 110 and the outer tube 120, by means of which a piston located in the inner tube 110 can be effectively damped. The flow brake 140 reduces the flow rate of the damping fluid 10, thereby preventing or at least reducing foam formation. As a result, the valve 130 can always be used in accordance with its function. By arranging the flow brake 140 at the outer tube 120, manufacturing is also simplified, thereby reducing the costs for the assembly.

[0045] exist Figure 1 1 and 2, it is also schematically shown that the flow brake 140 can be implemented as a projection 141, 142 that is circumferential on the inner side 121 of the outer tube 120, in particular in a spiral shape. The circumferential design achieves the following advantages: the flow velocity of the damping fluid 10 is reduced over the entire inner circumference of the outer tube and foaming is thereby prevented or reduced. In the case of a spiral design, the following advantages are also achieved: the flow velocity is reduced even at a greater height of the outer tube. In addition, the flow can be guided and the speed can be adjusted overall by the steepness of the spiral 141.

[0046] In another example (the other example is also in Figure 1 ), the flow brake 140 is implemented as a spiral portion 141. This achieves the following effect: depending on the application, the outer cylinder can be combined with a properly designed flow brake 140 without having to adapt the inner tube 110 and / or the outer tube 120. This simplifies the structural design and saves manufacturing costs.

[0047] It can also be provided that the flow brake 140 is implemented as a protrusion 142, in particular a stamped part, which is connected in one piece to the inner side 121 of the outer tube 120. By being in one piece, at least one step is omitted when assembling the shock absorber assembly, thereby simplifying the production. The design as a stamped part can also be manufactured particularly conveniently, so that the cost for the shock absorber assembly is particularly low overall.

[0048] Figure 1It is also shown that a latching aid 122 can be provided on the outer tube 120, which is designed to hold the flow brake 140 in a form-fitting manner on the outer tube 120. This achieves the advantage that the assembly of the shock absorber assembly 100 is further simplified. The flow brake 140 only needs to be brought roughly into the correct position, so that it then springs into the latching aid 122, which can be designed in particular as a recess, and remains in a mechanically stable position.

[0049] exist Figure 1 In the example shown in , the flow brake 140 is arranged at least partially between a damping gas region 150, which in the rest position contains mainly damping gas 20, and the valve 130. This achieves the advantage that the flow velocity is effectively reduced at locations where foaming occurs particularly frequently. In particular, the proximity to the valve 130 provides the advantage that this component, which is sensitive to foaming in its function, can be protected from the occurrence or intrusion of foam.

[0050] Furthermore, it can be provided that valve 130 is designed to influence the damping characteristic curve by adding or draining damping fluid 10. This achieves the advantage that the damping of the damper can be adapted to the conditions of the vehicle environment and / or the driver's preferences.

[0051] Figure 1 Also shown is a shock absorber 200 which has at least one shock absorber assembly 100 according to the invention.

[0052] Finally Figure 2 2 shows a vehicle 300 which has at least one shock absorber 200 according to the invention and / or a shock absorber assembly 100 according to the invention.

[0053] The above explanation of the embodiments only describes the present invention in the scope of examples. Of course, without departing from the scope of the present invention, as long as it is technically meaningful, a plurality of individual features of the embodiments can be freely combined with each other.

[0054] Reference numerals list

[0055] 10 Damping liquid

[0056] 20 Damping gas

[0057] 100 shock absorber structural assembly

[0058] 110 inner tube

[0059] 120 outer tube

[0060] 121 inside

[0061] 122 card lock auxiliary device

[0062] 130 valve

[0063] 140 Mobile brake

[0064] 141 Helix

[0065] 142 protrusion

[0066] 150 Damping Gas Area

[0067] 200 shock absorber

[0068] 300Transportation

Claims

1. A shock absorber structural assembly (100), in particular a shock absorber structural assembly for a transportation vehicle (300), the shock absorber structural assembly comprising: - an inner tube (110) which is filled with a damping liquid (10) and is designed to damp the movement of a piston in the inner tube (110); an outer tube (120) which is arranged around the inner tube (110), is fluidically connected to the inner tube (110) and is designed to receive the damping liquid (10) and the damping gas (20); a valve (130) which is designed to discharge the damping liquid (10) to the outer tube (120) and to discharge the damping liquid (10) from the outer tube (120), wherein the valve (130) is fluidically connected to the outer tube (120); a flow brake (140) embodied to brake the movement of the damping fluid (10); The flow brake (140) is arranged on the outer pipe (120).

2. The shock absorber structural assembly (100) according to claim 1, characterized in that: The flow brake (140) is designed as a projection (141, 142) which circumferentially extends, in particular helically, on the inner side (121) of the outer tube (120).

3. The shock absorber structural assembly (100) according to claim 1 or 2, characterized in that: The flow brake (140) is implemented as a spiral (141).

4. The shock absorber structural assembly (100) according to any one of the preceding claims, characterized in that The flow brake (140) is designed as a projection (142), in particular an embossing, which is integrally connected to the inner side (121) of the outer tube (120).

5. The shock absorber structural assembly (100) according to any one of the preceding claims, characterized in that The flow brake (140) is made of metal and / or plastic.

6. A shock absorber structural assembly (100) according to any one of the preceding claims, characterized in that A latching aid (122) is provided on the outer tube (120) and is designed to hold the flow brake (140) on the outer tube (120) in a form-fitting manner.

7. The shock absorber structural assembly (100) according to any one of the preceding claims, characterized in that The flow brake (140) is arranged at least partially between a damping gas region (150) and the valve (130), the damping gas region containing predominantly damping gas (20) in the rest position.

8. A shock absorber structural assembly (100) according to any one of the preceding claims, characterized in that The valve (130) is designed to influence the damping characteristic curve by adding or draining damping fluid (10).

9. A shock absorber (200) having at least one shock absorber assembly (100) according to any one of the preceding claims.

10. A vehicle (300) having at least one shock absorber (200) according to claim 9 and / or a shock absorber assembly (100) according to any one of claims 1 to 8.

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